Why is SUDOANG needed?

The abundance of the European eel (Anguilla anguilla) has been declining in the last 50 years and is outside safe biological limits, which guarantee the survival of the species. For this reason, the European eel has been included in the IUCN Red List of threatened species.

Even though the EU established a Recovery Plan in 2007, the population has not recovered. Why?

  • The lack of data and the variability of assessment methods limit the scope and effectiveness of the population monitoring.
  • Although the European eel is a single fish stock, it is assessed and managed as separate units.
  • There is a lack of dialogue and common strategies between the stakeholders (scientists, managers, fishermen, NGOs) and at different levels (local/regional/national).

In this context, a joint assessment is needed to obtain better knowledge and cooperation between the stakeholders involved.

The SUDOANG Project Work is currently being developed under the priority axis “Protecting the environment and promoting resource efficiency” of the Interreg SUDOE programme.

Consult the Interreg SUDOE Programme

Main threats

Habitat loss and degradation

Barriers to migration


Unsustainable exploitation

Illegal fishing and trafficking

Parasites and diseases

Climate change


SUDOANG will provide managers with common tools and methods that contribute to the conservation of the European eel and its habitat in the SUDOE area.

—    Provide common management and assessment tools

User-friendly web application that hosts several tools for managers to analyse stock indicators and different management scenarios.


—    Design a strategy to obtain data for coordinated and long-term monitoring

An eel sampling network that includes 10 pilot basins in the Mediterranean and Atlantic, representative of the different ecosystems of the SUDOE area.


—    Reinforce the cooperation between the stakeholders involved in eel stock governance

A governance platform that contributes to the concerted and effective management of eel.

Pilot basins

The pilot basins studied in SUDOANG are in the SUDOE area. These include all the Spanish autonomous communities (except the Canary Islands), the regions of Southwest France (Auvergne, Occitanie and Nouvelle Aquitaine), the mainland region of Portugal, the United Kingdom (Gibraltar) and the Principality of Andorra.

Click on each river to see the information and download the description of the basins (interactive map)


1.633.400 €

75% subsidy 

(€1,225,049.64) from the Interreg Sudoe Programme (ERDF Funds)

SUDOE priority core area

Protecting the environment and fostering resource efficiency 


1 March 2018 – 28 February 2021

Related projects


Adaptive Management of Barriers in European Rivers.


Pilot project to estimate the real and potential the silver eel escape.


Observatory of the migrant fish populations of the SUDOE area.


European eel (Anguilla anguilla) abundance and colonization INDICators.


Restoring eel stocks: Developing technical-scientific tools to implement management plans in European basins.

Migra Miño-Minho

Improving the protection and sustainable management of the natural border area consisting of the international sub-basin of the River Miño, including its tributaries.


Fishfriendly Innovative Technologies for Hydropower.


General Fisheries Commission for the Mediterranean (FAO).